public class TestStudent {
    public static void main(String[] args) {
        Student s1 = new Student();
        s1.show();
        s1.setName("李四");
        s1.setAge(10);
        s1.setId(10086);
        s1.show();
        System.out.println("=========");
        Student s2 = new Student("王二",18,10010);
        s2.show();
    }
}
